The Ashburton treaty of 1842 omitted to define the boundary line, and permitted, or rather did not prohibit, the joint occupation of Oregon by British and American settlers. This had been a subject of dispute for many years. The country on the Columbia River had been claimed by both. Under previous treaties the American northern boundary extended “to the latitude of 49 degrees north of the equator, and along that parallel indefinitely to the west.” Attempts were made in 1842 and continuing since to 1846, to settle this boundary line, by treaty with Great Britain. It had been assumed that we had a dividing line, made by previous treaty, along the parallel of 54 degrees 40 minutes from the sea to the Rocky mountains. The subject so much absorbed public attention, that the Democratic National convention of 1844 in its platform of principles declared for that boundary line, or war as the consequence. It became known as the 54–40 plank, and was a canon of political faith. The negotiations between the governments were resumed in August, 1844. The Secretary of State, Mr. Calhoun, proposed a line along the parallel of 49 degrees of north latitude to the summit of the Rocky mountains and continuing that line thence to the Pacific Ocean; and he made this proposition notwithstanding the fact that the Democratic party—to which he belonged—were then in a high state of exultation for the boundary of 54 degrees 40 minutes, and the presidential canvass, on the Democratic side, was raging upon that cry.